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	{\huge{\textbf{Acknowledgement}}}
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I would like to express my sincere gratitude towards my thesis supervisor Dr.Amey Karkare for his constant support and encouragement. I am grateful for his patient 
guidance and advice in giving a proper direction to my efforts. 
I would also like to thank the faculty and staff of the Department of CSE for the beautiful academic environment they have created here.


I am indebted to all my friends of the Mtech 2010 Batch for making these past two years a memorable one for me. I have been fortunate to be with some really 
interesting, fun people. I especially thank Adarsh, Ajith, Anvesh, Ashendra, Chitti, Keerthi and Vinay with whom I shared many a good times. Their company and their 
ability to infuse humor into any situation helped me get through some tough times.

Last, but not the least, I would like to thank my parents and my elder brother for their love, constant support and encouragement. Without their support and patience
this work would not have been possible.

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\textit{\textbf{Saravana Perumal}}
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